Reconstructing late Holocene relative sea-level changes at the Magdalen Islands (Gulf of St. Lawrence, Canada) using multi-proxy analyses

2017 ◽  
Vol 32 (3) ◽  
pp. 380-395 ◽  
Author(s):  
Robert L. Barnett ◽  
Pascal Bernatchez ◽  
Michelle Garneau ◽  
Marie-Noëlle Juneau
Keyword(s):  
Sea Level ◽  
Late Holocene ◽  
Sea Level Changes ◽  
Relative Sea Level ◽  
Magdalen Islands

scholarly journals Relative sea-level changes and glacio-isostatic adjustment on the Magdalen Islands archipelago (Atlantic Canada) from MIS 5 to the late Holocene

2017 ◽  
Vol 171 ◽  
pp. 216-233 ◽  
Author(s):  
Audrey M. Rémillard ◽  
Guillaume St-Onge ◽  
Pascal Bernatchez ◽  
Bernard Hétu ◽  
Jan-Pieter Buylaert ◽  
...  
Keyword(s):  
Sea Level ◽  
Late Holocene ◽  
Atlantic Canada ◽  
Sea Level Changes ◽  
Relative Sea Level ◽  
Isostatic Adjustment ◽  
Mis 5 ◽  
Magdalen Islands

Late Holocene sea-level changes and isostasy in western Denmark

2006 ◽  
Vol 66 (2) ◽  
pp. 288-302 ◽  
Author(s):  
W. Roland Gehrels ◽  
Katie Szkornik ◽  
Jesper Bartholdy ◽  
Jason R. Kirby ◽  
Sarah L. Bradley ◽  
...  
Keyword(s):  
Salt Marsh ◽  
Sea Level ◽  
Salt Marshes ◽  
Late Holocene ◽  
Glacial Isostatic Adjustment ◽  
Sea Level Changes ◽  
Relative Sea Level ◽  
Isostatic Adjustment ◽  
Tidal Embayment ◽  
Made In

AbstractCores and exposed cliff sections in salt marshes around Ho Bugt, a tidal embayment in the northernmost part of the Danish Wadden Sea, were subjected to 14C dating and litho- and biostratigraphical analyses to reconstruct paleoenvironmental changes and to establish a late Holocene relative sea-level history. Four stages in the late Holocene development of Ho Bugt can be identified: (1) groundwater-table rise and growth of basal peat (from at least 2300 BC to AD 0); (2) salt-marsh formation (0 to AD 250); (3) a freshening phase (AD 250 to AD 1600?), culminating in the drying out of the marshes and producing a distinct black horizon followed by an aeolian phase with sand deposition; and (4) renewed salt-marsh deposition (AD 1600? to present). From 16 calibrated AMS radiocarbon ages on fossil plant fragments and 4 calibrated conventional radiocarbon ages on peat, we reconstructed a local relative sea-level history that shows a steady sea-level rise of 4 m since 4000 cal yr BP. Contrary to suggestions made in the literature, the relative sea-level record of Ho Bugt does not contain a late Holocene highstand. Relative sea-level changes at Ho Bugt are controlled by glacio-isostatic subsidence and can be duplicated by a glacial isostatic adjustment model in which no water is added to the world's oceans after ca. 5000 cal yr BP.

scholarly journals Geomorphology of the Coastal Sand Dune Fields and Their Association with the Palaeolandscape Evolution of Akrotiri Peninsula, Lemesos, Cyprus

Geosciences ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 448
Author(s):  
Miltiadis Polidorou ◽  
Niki Evelpidou
Keyword(s):  
Sea Level ◽  
Late Holocene ◽  
Sand Dune ◽  
Salt Lake ◽  
Sea Level Changes ◽  
Coastal Sand Dune ◽  
Relative Sea Level ◽  
Upper Pleistocene ◽  
Dune Field ◽  
Coastal Sand

Two well-developed late Pleistocene dune fields have been identified on the western and eastern side of Akrotiri promontory (Lemesos, Cyprus). The dune fields extend immediately from the low level of their source beaches onto higher ground (>48 m amsl). Geomorphic observations supported by OSL dating and sedimentological data provided evidence of the dune development and for the palaeogeographic reconstruction of the area. Relative sea level changes and wave action during the upper Pleistocene and Holocene played an important role into the development of the palaeolandscape and affected the formation of the dunes. From the collected data the development of the western dune field started at 56.2 ± 5.5 ka when the relative sea level was at approximately −60 m and contributed to the development of the western tombolo of the area whereas the eastern dune field developed in the late Holocene, after the formation of the eastern spit that resulted in the formation of the Akrotiri Salt lake.

scholarly journals SEISMIC STRATIGRAPHY OF TRAPANDÉ BAY (SOUTHERN BRAZIL) TO STUDY SEA-LEVEL CHANGES AND DEPOSITION EVOLUTION IN THE UPPER QUATERNARY

2019 ◽  
Vol 37 (4) ◽  
Author(s):  
Vinicius S. Rodrigues ◽  
Daniel P. V. Alves ◽  
Luigi Jovane ◽  
Luis A. P. De Souza
Keyword(s):  
Sea Level ◽  
Late Holocene ◽  
Seismic Stratigraphy ◽  
Sao Paulo ◽  
São Paulo ◽  
Sea Level Changes ◽  
Relative Sea Level ◽  
Bathymetric Data ◽  
Depositional Evolution ◽  
Seismic Sections

ABSTRACT. The Quaternary relative sea-level in the Southeastern Brazilian margin is mostly studied using a sedimentary approach. In this work, we used high-resolution seismic and bathymetric data to study the depositional evolution in the Quaternary of Trapandé Bay, in São Paulo State, Brazil. Using seismic stratigraphy, we have analyzed over 198 km of seismic sections and we interpreted 6 seismic horizons which defined 5 seismic units. The oldest unit (U1) is related to the highstand deposits developed during Marine Isotope Stages (MIS) 5. The horizon H1 represents the erosional surface formed during the regression that culminated in the Last Glacial Maximum (LGM). After that, during the first stabilization period of sea-level rise, unit U2 formed and was subsequently eroded by a rapid flood of the bay, forming the erosional surface H2. During middle and late Holocene, it was identified a transgressive tract in the unit U3 and a progradational facies in unit U4, limited to the more coastal regions. Finally, unit U5 developed in Late Holocene, with depositional characteristics similar to those of present time. We found none seismic expression of Late Holocene high-frequency relative sea- level oscillations.Keywords: seismic stratigraphy, Quaternary oceanography, paleochannels, Cananéia-Iguape, Holocene transgression, relative sea-level.RESUMO.As variações relativas do nível do mar na margem sudeste do Brasil são estudadas principalmente a partir de uma abordagem sedimentológica. Neste trabalho, foram utilizados dados batimétricos e sísmicos de alta resolução para o estudo da evolução deposicional do Quaternário na Baía de Trapandé, no Estado de São Paulo, Brasil. Utilizando uma análise sismoestratigráfica, foram analisados mais de 198 km de seções sísmicas e interpretados 6 horizontes sísmicos que definiram 5 unidades sísmicas. A unidade mais antiga (U1) está relacionada com os depósitos de mar alto desenvolvidos durante o Estátio Isotópico 5. O horizonte H1 representa a superfície erosiva formada durante a regressão marinha que culminou no Último Máximo Glacial. Em seguida, durante a primeira estabilização da subida do nível do mar, a unidade U2 se depositou e em seguida foi erodida por um rápido afogamento da baía, formando a superfície erosiva H2. Durante o Holoceno médio e tardio, foram identificados um trato transgressivo na unidade U3 e fácies progradacionais na unidade U4, sendo estas últimas limitadas às áreas mais costeiras. Finalmente, a unidade U5 se desenvolveu durante o Holoceno tardio, com características deposicionais similares àquelas atuais. Não foram encontradas expressões sísmicas das oscilações de alta frequência do nível do mar do Holoceno tardio.Palavras-chave: Sismoestratigrafia, oceanografia do Quaternário, paleocanais, Cananéia-Iguape, Holoceno, transgressão, nível do mar relativo

Late Holocene vertical land motion and relative sea-level changes: lessons from the British Isles

2011 ◽  
Vol 27 (1) ◽  
pp. 64-70 ◽  
Author(s):  
Ian Shennan ◽  
Glenn Milne ◽  
Sarah Bradley
Keyword(s):  
Sea Level ◽  
Late Holocene ◽  
British Isles ◽  
Sea Level Changes ◽  
Relative Sea Level ◽  
Vertical Land Motion

Late Holocene relative sea-level changes in Lebanon, Eastern Mediterranean

2006 ◽  
Vol 230 (1-2) ◽  
pp. 99-114 ◽  
Author(s):  
Christophe Morhange ◽  
Paolo A. Pirazzoli ◽  
Nick Marriner ◽  
Lucien F. Montaggioni ◽  
Tanios Nammour
Keyword(s):  
Sea Level ◽  
Late Holocene ◽  
Eastern Mediterranean ◽  
Sea Level Changes ◽  
Relative Sea Level

scholarly journals Late Holocene (0–6 ka) sea-level changes in the Makassar Strait, Indonesia

2020 ◽  
Vol 16 (4) ◽  
pp. 1187-1205 ◽  
Author(s):  
Maren Bender ◽  
Thomas Mann ◽  
Paolo Stocchi ◽  
Dominik Kneer ◽  
Tilo Schöne ◽  
...  
Keyword(s):  
Sea Level ◽  
Late Holocene ◽  
Glacial Isostatic Adjustment ◽  
Mantle Structure ◽  
Ice Melting ◽  
Sea Level Changes ◽  
Relative Sea Level ◽  
The Past ◽  
Isostatic Adjustment ◽  
Spermonde Archipelago

Abstract. The Spermonde Archipelago, off the coast of southwest Sulawesi, consists of more than 100 small islands and hundreds of shallow-water reef areas. Most of the islands are bordered by coral reefs that grew in the past in response to paleo relative sea-level changes. Remnants of these reefs are preserved today in the form of fossil microatolls. In this study, we report the elevation, age, and paleo relative sea-level estimates derived from fossil microatolls surveyed in five islands of the Spermonde Archipelago. We describe 24 new sea-level index points, and we compare our dataset with both previously published proxies and with relative sea-level predictions from a set of 54 glacial isostatic adjustment (GIA) models, using different assumptions on both ice melting histories and mantle structure and viscosity. We use our new data and models to discuss Late Holocene (0–6 ka) relative sea-level changes in our study area and their implications in terms of modern relative sea-level estimates in the broader South and Southeast Asia region.

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